WifiService: use wifi association state to determine if we should suspend wifi instead of the existance of an IP address.
WifiService: use wifi association state to determine if we should suspend wifi instead of
the existance of an IP address.

Signed-off-by: San Mehat <b23d0c7bb708db91c8b9415ae7caad6fe333f717@google.com>

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base